<template>
<div>
 <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
              <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
              <el-breadcrumb-item>商品管理</el-breadcrumb-item>
             <el-breadcrumb-item>参数列表</el-breadcrumb-item>
        </el-breadcrumb>

 <!-- 卡片视图区域 -->
<el-card>
<!--警告区域-->
  <el-alert title="注意:只允许为第三级分类设置相关参数" type="warning" show-icon :closable="false"></el-alert>
<!--选择商品分类区域-->
<el-row class="cat_opt">
<el-col>
<span>选择商品分类</span>
<!--商品分类的级联选择框 -->
<el-cascader
 v-model="selectedCateKeys"
    :options="catelist"
    :props="cascderProps"
   @change="handleChange">
</el-cascader>
</el-col>
</el-row>
<!--tab标签页面-->
<el-tabs v-model="activeName" @tab-click="handleClick">
<el-tab-pane label="动态参数" name="many">
<el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加参数</el-button>
<!--动态参数表格-->
<el-table :data="manyTableData" border stripe>
 <!--展开行-->
 <el-table-column type="expand">
 <template slot-scope="scope">
 <!--循环渲染tag标签-->
 <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i, scope.row)">
 {{item}}
 </el-tag>
 <!--输入框-->
 <el-input
  class="input-new-tag"
  v-if="scope.row.inputVisible"
   v-model="scope.row.inputValue"
  ref="saveTagInput"
  size="small"
  @keyup.enter.native="handleInputConfirm(scope.row)"
   @blur="handleInputConfirm(scope.row)"
 >
 </el-input>
 <!--添加按钮-->
 <el-button v-else  size="small" @click="showInput(scope.row)">+ New Tag</el-button>
 </template>
 </el-table-column>
<el-table-column label="参数名称" prop="attr_name"></el-table-column>
 <el-table-column label="操作">
 <template slot-scope="scope">
 <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
 <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
</template>
</el-table-column>
</el-table>
</el-tab-pane>
<el-tab-pane label="静态属性" name="only">
<el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加属性</el-button>
<!--静态参数表格-->
<el-table :data="onlyTableData" border stripe>
<!--展开行-->
<el-table-column type="expand">
<template slot-scope="scope">
<!--循环渲染tag标签-->
<el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i, scope.row)">
{{item}}
</el-tag>
<!--输入框-->
<el-input
 class="input-new-tag"
 v-if="scope.row.inputVisible"
 v-model="scope.row.inputValue"
 ref="saveTagInput"
 size="small"
 @keyup.enter.native="handleInputConfirm(scope.row)"
 @blur="handleInputConfirm(scope.row)"
>
</el-input>
<!--添加按钮-->
<el-button v-else  size="small" @click="showInput(scope.row)">+ New Tag</el-button>
</template>
</el-table-column>
<el-table-column label="参数名称" prop="attr_name"></el-table-column>
<el-table-column label="操作">
<template slot-scope="scope">
<el-button size="mini" type="primary" icon="el-icon-edit"  @click="addDialogVisible = true">编辑</el-button>
<el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
</template>
</el-table-column>
</el-table>
</el-tab-pane>
 </el-tabs>
</el-card>
<!--添加参数对话框-->
<el-dialog
  :title="'添加' + this.titleText"
:visible.sync="addDialogVisible"
  width="50%" @close="addDialogClosed">
 <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" class="demo-ruleForm">
  <el-form-item :label="this.titleText" prop="attr_name">
  <el-input v-model="addForm.attr_name"></el-input>
 </el-form-item>
</el-form>
<span slot="footer" class="dialog-footer">
 <el-button @click="addDialogVisible = false">取 消</el-button>
  <el-button type="primary" @click="addParams">确 定</el-button>
 </span>
</el-dialog>
<!--修改对话框-->
<el-dialog
 :title="'修改'+this.titleText"
 :visible.sync="editdialogVisible"
 width="50%" @close="editDialogClosed">
<el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px" class="demo-ruleForm">
    <el-form-item label="活动名称" prop="attr_name">
<el-input v-model="editForm.attr_name"></el-input>
   </el-form-item>
</el-form>
 <span slot="footer" class="dialog-footer">
 <el-button @click="editdialogVisible = false">取 消</el-button>
 <el-button type="primary" @click="editParams">确 定</el-button>
  </span>
</el-dialog>

</div>
</template>

<script>
export default {
  data () {
    return {
      // 商品分类列表
      catelist: [],
      // 级联选择框双向数据绑定到的数组
      selectedCateKeys: [],
      // 级联选择框的配置对象
      cascderProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 默认选择项
      activeName: 'many',
      // 动态参数
      manyTableData: [],
      // 静态参数
      onlyTableData: [],
      // 控制添加参数对话框的显示与隐藏
      addDialogVisible: false,
      addForm: {
        attr_name: ''
      },
      addFormRules: {
        attr_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      },
      // 控制修改参数对话框的显示与隐藏
      editdialogVisible: false,
      editForm: {},
      editFormRules: {
        attr_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]

      }
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取商品分类列表数据
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类列表失败')
      }
      // console.log(res.data)
      this.catelist = res.data
    },
    // 级联框发生变化
    async handleChange () {
      this.getParamsData()
    },
    // tab页签点击变化时触发
    handleClick () {
      console.log(this.activeName)
      this.getParamsData()
    },
    // 获取参数列表
    async getParamsData () {
      // 证明选中的不是三级分类
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return {}
      }
      console.log(this.selectedCateKeys)
      const { data: res } = await this.$http.get(`categories/${this.createId}/attributes`, { params: { sel: this.activeName } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败')
      }
      // console.log(res.data)

      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : [],
        // 切换添加按钮和输入框显示
        item.inputVisible = false
        item.inputValue = ''
      })
      console.log(res.data)
      // 证明获取的是动态参数数据
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      }
      this.onlyTableData = res.data
    },
    // 监听对话框的关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击确定添加参数
    addParams () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return {}
        const { data: res } = await	this.$http.post(`categories/${this.createId}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName
          })
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败')
        }
        this.$message.success('添加成功')
        this.getParamsData()
        this.addDialogVisible = false
      })
    },
    // 修改参数信息
    async showEditDialog (attrId) {
      const { data: res } = await this.$http.get(`categories/${this.createId}/attributes/${attrId}`, { params: { attr_sel: this.activeName } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数信息失败')
      }
      this.editForm = res.data
      this.editdialogVisible = true
    },
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 点击修改按钮参数
    editParams () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return {}
        const { data: res } = await this.$http.put(`categories/${this.createId}/attributes/${this.editForm.attr_id}`, { attr_name: this.editForm.attr_name, attr_sel: this.activeName })
        if (res.meta.status !== 200) {
          return this.$message.error('修改参数失败')
        }
        this.$message.success('修改参数成功')
        this.getParamsData()
        this.editdialogVisible = false
      })
    },
    // 点击删除参数
    async removeParams (attrId) {
      const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('您取消本次删除操作')
      }
      // 发起请求删除参数
      const { data: res } = await this.$http.delete(`categories/${this.createId}/attributes/${attrId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除参数失败')
      }
      this.$message.success('删除参数成功')
      this.getParamsData()
    },
    async handleInputConfirm (row) {
      // console.log('ok')
      // 对输入框做非空校验
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return {}
      }
      // 如果没有return 就应该进行添加操作
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveAttrVales(row)
    },
    showInput (row) {
      row.inputVisible = true
      // 让输入框自动获得焦点
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    async saveAttrVales (row) {
      const { data: res } = await this.$http.put(`categories/${this.createId}/attributes/${row.attr_id}`, {
        attr_name: row.attr_name,
        attr_sel: this.activeName,
        attr_vals: row.attr_vals.join()
      })
      if (res.meta.status !== 200) {
        return this.$message.error('更新参数项失败')
      }
      this.$message.success('更新参数项成功')
    },
    // 监听tag标签删除事件
    handleClose (i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrVales(row)
    }
  },
  computed: {
    isBtnDisabled () {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    // 获取三级分类id
    createId () {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    // 动态计算添加对话框文本
    titleText () {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    }
  }
}
</script>

<style lang="less" scoped>
.cat_opt{
margin: 15px 0;
}
.el-tag{
margin: 10px;
}
.input-new-tag{
width: 150px;
}
</style>
